Population structure, length-weight and length-length relationships of six populations of the Bartail Flathead Platycephalus indicus (Scorpaeniformes: Platycephalidae) along the Persian Gulf coastal waters

Abstract

The size frequency distribution for age structure, lengthweight (LWR) and length-length (LLR) relationships of six populations of Platycephalus indicus along the Persian Gulf coastal waters in Iran are reported. A total of 180 P. indicus specimens were studied from six localities including Charak, Bandar-Abbas, Shif, Motaf, Khur-Musa and Bahrekan. The maximum standard length recorded for the studied populations ranged between 300 to 510 mm and the b values of the length-weight relationships ranged between 3.0 and 3.2. The obtained results indicated isometric growth patterns for all these populations with the exception of the Bahrekan population which showed a positive allometric growth pattern. The LLR between the total and standard lengths in these populations were found to be highly significant. The results would be useful for further studies on population assessment and sustainable conservation of the fish along the Persian Gulf coastal waters.

Length-weight relationships of six species of the genera Cobitis and Sabanejewia (Cobitidae) in Iranian river systems

“…It is well known that the functional regression b value represents the body form of fish (Kalayci, Samsun, Bilgin, & Samsun, ; Mousavi‐Sabet, Heidari, Fekrandish, ; Ricker, ), and is affected by a number of factors such as gonad maturity, sex, diet, stomach fullness, health, age, and fishing time, as well as the area and fishing vessels (Mousavi‐Sabet, Homayouni, et al., ; Mousavi‐Sabet, Heidari, Paknejad, ; Wootton, ); however, these factors were not considered in the present study. The narrow sample size and/or the length range possibly affected the b values of the study.…”

“…Fish LWRs are useful for converting length observations into weight estimates to provide some measure of biomass (Froese, , ; Mousavi‐Sabet, Heidari, & Fekrandish, ). This information is necessary for area fisheries management as well as for estimation of the biomass of the fish species (Froese, ; Mousavi‐Sabet, Heidari, & Paknejad, ).…”

Length-weight and length-length relationships for two gobiids from the Anzali Wetland, in the southern Caspian Sea basin

“…It is well known that the functional regression b value represents the body form of fish (Kalayci, Samsun, Bilgin, & Samsun, ; Mousavi‐Sabet, Heidari, & Paknejad, ; Ricker, ), and is affected by a number of factors such as gonad maturity, sex, diet, stomach fullness, health, age, fishing time as well as the area and fishing vessels (Mousavi‐Sabet, Heidari, Abbasi, & Vatandoust, ; Mousavi‐Sabet, Heidari, & Fekrandish, ; Wootton, ); however, these factors were not considered in the present study. The narrow sample size or the length range possibly affected the b values of the study.…”

“…Fish length–weight relationships (LWRs) are useful for converting length observations into weight estimates to provide some measure of biomass (Froese, , ; Mousavi‐Sabet, Heidari, & Vatandoust, a; Mousavi‐Sabet, Homayouni, Marjani, & Heidari, ). This information is necessary for fisheries management in the area as well as for estimation of the biomass of the fish species (Froese, ; Mousavi‐Sabet, Heidari, & Fekrandish, ; Mousavi‐Sabet, Heidari, Mohamadi‐Darestani, Mansouri‐Chorehi, & Ghasemzadeh, ). The length–length relationships (LLRs) are used to convert length measurements from one length‐type into another (Froese, , ; Mousavi‐Sabet, Heidari, & Vatandoust, b).…”

Length-weight and length-length relationships for 11 species of the genusAlburnoidesJeitteles, 1861 (Cyprinidae) from Iran

“…It is well known that the functional regression b value represents the body form of fish (Kalayci, Samsun, Bilgin, & Samsun, ; Mousavi‐Sabet, Heidari, & Paknejad, ; Ricker, ), and which is affected by a number of factors such as gonad maturity, sex, diet, stomach fullness, health, age, and fishing time as well as the area and the fishing vessels (Mousavi‐Sabet, Heidari, & Fekrandish, ; Mousavi‐Sabet, Heidari, & Paknejad, ; Wootton, ); however, these factors were not considered in the present study. The narrow sample size and/or the length range possibly affected the b values in the study.…”